Edwaed b



(No Model.) v

E. BvI IV'ES. PHOTOGRAPHIG PLATE HOLDER. No. 246,140. Patented Aug. 23,1881.

WITNBssBs: y INVENTOR- W/... f/QMM, Mdm d f y BY I ATTORNEYS. i

UNITED STATES PATENT OFFICE.

EDWARD B. IVES, OF WEST POINT, NEW YORK..

PHoToGRAPHle-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 246,140, dated August 23, -1881.

l Application flied Aprila), 1881. (No model.)

To all whom it may concern Be it known that I, EDWARD B. IVEs, of West Point, in the county of Orange and State of New York, have invented a new and useful Improvement in Photographic-Plate Holders, of which the following :is a specification.

My invention relates to a device for holding the sensitive plate for insertion in and removal from the camera.

The invention consists, essentially, in anovel mode of constructing the holder by attaching together anumberof layers of material in the ithe back or bottom of the holder.

B is apiece of the same exterior dimensions, having a rectangular piece of t-he same size as the plate to be carried cut from its center, leaving a border, b, around its four sides or f edges.

U is a similar' piece, but with a larger piece cut from it, and consequently having its bori,

der c narrower than the border b.

D is a similar piece, except that its border d extends only on three sides, leaving the upper edge open. v

E is a piece similar to the piece C, having its border e extending around its four sides.

G is a dark-shutter, adapted to slide in and out-between the pieces C and E, with its edges engaging with and guided by the grooves formed by the inner and outer sides of the borders c and e and the inner edges of the border d, when the live pieces are secured together to form the holder, which securing may be accomplished by gluing, riveting, or any other suitable means, according to the nature of the material employed.

The plateP is placed in the opening formed .inthe piece B,with the back of the plate resting against the back or bottom A, in which position it is held by buttons m. It is held steadily in place and prevented from vibrating by bending or curving the back or bottom A, or by interposing between the bottom andthe plate a spring, or a piece of rubber, felt, or other suitable substance.

The top of the opening in which the shutter Gr slides may be made impervious to light by means of a cut-off, H, of velvet or other suitable material. Ihe lower corners ofthe shutter Gare rounded, and its bottom edge between said corners is concave, so that when the shutter is pushed into place the rounded corners tirst engage with the corners ot' the groove, and thus insure the proper engagement of the remainder ot' the lower edge by causing the concave edge to ride on the edge of the groove in ease ot' either part heilig warped or spILun g.

In the ordinary holder the negative is in'- serted from the rear, with its face inward,and

a hingedv back is closed upon it. When this back is not closed perfectly tight light is liable to be admitted to the plate.

By making my holder with its back perfectly tight, and inserting the plate from the front, with its back toward the closed back or bottom ofthe holder, the accidental admission ot' light is rendered impossible.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. As an improved article of manufacture, a photographicplate holder constructed ot' thin layers A B G D E of card-board, substantially in the manner and for the purpose herein described.

2. The sliding dark-shutter G, in combina' tion with a holder constructed of layersA of card-board, provided with a groove formed by the borders c, d, and e, substantially as and for the purpose herein described. y

3. In a photographicplate holder, the shutter G, having rounded lower corners, and between said corners a concave bottom edge, as and for the purpose specified.

EDWARD E. rvEs.

Witnesses C. SEDGWICK, J. H. ScAEEoEoUeH. 

